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Taranaki Regional Council Monthly Rainfall and Environmental
Data Report for August 2022
02 September, 2022
Provisional Data Only. Note: some sites record a number of parameters
1. Rain gauge values throughout the region
Note: Taranaki co-owns rain-gauges with Horizons, so we can assess rainfalls right-out
over the Eastern Hill Country.
Map1: Rain gauge sites
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Table 1: Rainfall monthly and year to date totals at 27 rain gauge sites in
https://www.nems.org.nz/documents/water-quality-part-3-lakes/
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Technical Memorandum | Draft Baseline State for Escherichia coli and Cyanobacteria (Planktonic) in Taranaki Rivers and Lakes
year at 40 popular primary contact sites, including a range of beaches, rivers and lakes around Taranaki. There
are 23 freshwater sites (i.e. rivers and lakes) included in the current CISH programme.
The monitoring results highlight the impact that rainfall has on recreational water quality. Escherichia coli
concentrations can be
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Map1: Rain gauge sites
Table 1: Rainfall monthly and year to date totals at 27 rain gauge sites in Taranaki.
June Year to Date
Hydro_Sites # days >
0.5 mm
Total
Rainfall
(mm)
% of
typical
month
Total to
date (mm)
% of typical
year to date
% of typical
full year
Records
Began
North Egmont at
Visitors Centre 8 658.0 98.4 2915.0 99.0 43.4 1991
Dawson Falls 5 906.0 191.2 3102.5 151.4 68.9 1933
Kahui
during the 2021-2022 monitoring year, with south Taranaki
commencing irrigation in November and the rest of the region beginning in January. Irrigation concluded
late April through to early May across the region. Rainfall recorded at the Council’s monitoring locations
over the summer irrigation period ranged between 82% and 203% of historical mean values. Even though
rainfall volumes were higher than previous years, the irrigation season was longer with total irrigation water
usage of 6,960 ML
forming a tributary of the much larger Mimitangiatua awa
catchment. It runs from south-east to north-west. Almost the entire valley formed by the Stream is owned
by the Company, and consists of steep eroded hillsides, multiple side gullies, and small river flats distributed
along its length. The area receives more rainfall than the northern Taranaki coastline to the south-west. Soils
are generally poor and highly erodible. Patches of bush and planted trees cover most of the hillsides, with
the
a week between 1 November and 31 March each
year at 40 popular primary contact sites, including a range of beaches, rivers and lakes around Taranaki.
There are 23 freshwater sites (i.e. rivers and lakes) included in the current CISH programme.
The monitoring results highlight the impact that rainfall has on recreational water quality. Escherichia coli
concentrations can be significantly elevated at primary contact sites for up to three days following heavy
rainfall. This is owing to the
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Monthly Year to Date
Hydro_Sites # days >
0.5 mm
Total
Rainfall
(mm)
% of
typical
month
Total to
date (mm)
% of typical
year to date
% of typical
full year
Records
Began
North Egmont at
Visitors Centre 17 713.0 112.0 2257.0 99.2 33.6 1991
Dawson Falls 16 555.0 120.1 2196.5 139.5 48.8 1933
Kahui Hut 20 563.5 125.2 1665.0 101.3 34.5 2006
Mangorei Upper at
Forest Hill 17 450.5 118.6 1512.0
d) Construction timetable for the erosion and sediment control works and the bulk earthworks
proposed;
e) Maintenance, monitoring and reporting procedures;
f) Rainfall response and contingency measures including procedures to minimise adverse effects in
the event of extreme rainfall events and/or the failure of any key erosion and sediment control
structures;
g) Procedures and timing for review and/or amendment to the erosion and sediment control
measures listed in the ESCP; and,
Manawa Energy Patea HEP Annual Report 2022-2023
also be a potential indicator of intensive land use
impact where fertiliser is applied to land (Rosen, 2001).
- - - - - -
Chloride (Cl)
Chloride is relatively unaffected by geochemical processes which makes it a good indicator of general
groundwater quality. The primary source of chloride in groundwater is marine sourced rainfall recharge to
an aquifer. However, saltwater intrusion and land use activities, such as wastewater and effluent
discharges, can contribute chloride to …